History: Tirumala Venkateswara Shrine

Ancient history
The origins of the site are legendary. Its beginnings are shrouded in great antiquity and its origins are still a matter of scholarly debate. Srivaishnavite experts opine that the Rig Veda verse X.155.1 makes an indirect reference to the temple. One such translation goes as:
Thondaiman, ruler of the ancient Thondaimandalam (present day Kanchipuram) (capital: Kanchipuram, just south of modern day Chennai), is believed to have first built the temple after visualizing Lord Vishnu in his dream. He built the Gopuram and the Prakhara, and arranged for regular prayers to be conducted in the temple. Later on the Chola dynasty vastly improved the temple and gave rich endowments. To date, you will find the various Tamil Grantha script within the Temple prakara walls. The Sangam literature of Tamil such as that of Silapadikaram and Satanar Manimekalai, dated between 500BC and 300AD, mentions Thiruvengadam (now named Tirupati) by the appellation "Nediyon Kunram" as the northernmost frontier of the Tamil kingdoms. In fact, a fairly detailed description of the deity is given in lines 41 to 51 of book 11 of the Silapadikaram. Again, appellation "Nediyon" for the deity occurs in these verses:
Puranic literature which was composed roughly around the post-Mauryan and early-Gupta era also mentions of Tirupati as the Aadhi Varaha Kshetra. The Puranas associate the site with Lord Varaha one of the incarnations of Lord Vishnu. The Varaha shrine holds great importance in Tirupati and is said to be older than the main sanctum of Venkateswara. There is also the Ranga Mandapam, which is to the left side of the temple as we enter. This is where the main deity "Sri Ranganatha Swamy" of SriRangam Temple (Trichy) was protected, for a period of almost 60 years, during attacks by Malik Kafur in the 14th Century.
Medieval history
It was under the regime of the Vijayanagara emperors that the temple attained the majority of its current opulence and size with the donation of expensive jewellery made of diamonds and gold. The coronation ceremonies of the emperors were also held at Tirupati. In 1517, Krishnadevaraya, on one of his many visits to the temple, donated gold and jewels enabling the Vimana (inner shrine) roofing to be gilded. The Maratha general Raghoji Bhonsle visited the temple and set up a permanent administration for the conduct of worship in the temple. Among the later rulers who endowed large benefactions were the rulers of Mysore and Gadwal.
In 1843, with the coming of the East India Company, the administration of the Sri Venkateswara temple and a number of shrines was entrusted to Seva Dossji of the Hathiramji Mutt at Tirumala as Vicaranakarta for nearly a century until 1932, when Tirumala Tirupati Devasthanams (TTD) was established as a result of TTD Act, 1932.
Modern history
TTD is operated by a Board of Trustees has increased in size through adoption of various Acts from five (1951) to fifteen (1987). The daily operation and management of TTD is the responsibility of Executive Officer (EO) who is appointed by the AP government.
The temple brings around 60,000 pilgrims every day. The popularity of the temple can be judged by the annual budget which was estimated at Rs 10 billion in 2008 with almost everything coming directly from donations. Devotees give donations which runs into millions. TTD, the organisation running the welfare of the temple, runs various charitable trusts whose funds are derived from the budget and donations from the devotees.
Source: Wikipedia